/*
 * Copyright (c) 2020 - present, Inspur Genersoft Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.inspur.edp.bff.designtime.generator.core.rtgen.managergenerator.mgrImplclass.methodgenerators;

import com.inspur.edp.bff.designtime.generator.core.rtgen.managergenerator.mgrImplclass.FSMgrImplGenContext;
import com.inspur.edp.caf.generator.baseInfo.ParameterInfo;
import com.inspur.edp.caf.generator.baseInfo.TypeInfo;
import com.inspur.edp.caf.generator.method.ClassMethodGenerator;
import com.inspur.edp.caf.generator.utils.ExpressionUtils;
import com.inspur.edp.cef.generator.overall.GeneratorUtil;
import org.eclipse.jdt.core.dom.*;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;

public class GetBECodeFromVMMethodGenerator extends ClassMethodGenerator {
    private static final String parm_vmObjectCode = "vmObjectCode";
    private FSMgrImplGenContext fsMgrImplGenContext;

    public GetBECodeFromVMMethodGenerator(FSMgrImplGenContext fsMgrImplGenContext) {
        this.fsMgrImplGenContext = fsMgrImplGenContext;
    }

    @Override
    protected Block buildMethodBody() {
        Block block = ast.newBlock();
        SwitchStatement switchStatement = ast.newSwitchStatement();
        switchStatement.setExpression(ast.newSimpleName(parm_vmObjectCode));
        getObjectCases(switchStatement);
        getDefaultCase(switchStatement);
        block.statements().add(switchStatement);
        return block;
    }

    private void getObjectCases(SwitchStatement switchStatement) {
        for (Map.Entry<String, String> item : fsMgrImplGenContext.getMgrGenContext().getFSGeneratorContext().getFsIntermediateTypeInfo().getFSDataInfo().getVmBEObjectMappingDict().entrySet()) {
            SwitchCase switchCase = ast.newSwitchCase();
            switchCase.setExpression(GeneratorUtil.getStringLiteral(ast, item.getKey()));
            switchStatement.statements().add(switchCase);

            ReturnStatement returnStatement = ast.newReturnStatement();
            returnStatement.setExpression(GeneratorUtil.getStringLiteral(ast, item.getValue()));
            switchStatement.statements().add(returnStatement);
        }
    }

    private void getDefaultCase(SwitchStatement switchStatement) {
        SwitchCase switchCase = ast.newSwitchCase();
        switchCase.setExpression(null);
        switchStatement.statements().add(switchCase);

        switchStatement.statements().add(ExpressionUtils.getReturnNullStatement(ast));
    }

    @Override
    protected boolean getIsOverride() {
        return true;
    }

    @Override
    protected ArrayList<Modifier.ModifierKeyword> getAccessModifiers() {
        return new ArrayList<>(Arrays.asList(new Modifier.ModifierKeyword[]{Modifier.ModifierKeyword.PROTECTED_KEYWORD}));
    }

    @Override
    protected String getMethodName() {
        return "getBECodeFromVM";
    }

    @Override
    protected ArrayList<ParameterInfo> getParameterCollection() {
        ParameterInfo parameterInfo = new ParameterInfo();
        parameterInfo.setParamType(new TypeInfo(String.class));
        parameterInfo.setParamName(parm_vmObjectCode);
        return new ArrayList<>(Arrays.asList(new ParameterInfo[]{parameterInfo}));
    }

    @Override
    protected TypeInfo getReturnType() {
        return new TypeInfo(String.class);
    }
}
